That would make combat more "interesting," possibly a nice addition to Tactician difficulty too. Old gamers who have played a 90s PC game called "Heroes of Might and Magic" (which is also a turn-based, overhead-view strategy game) would remember that enemies would flee in that game, or at least attempt to. In that game, fleeing inflicts a penalty, such as loss of morale, or other stats. In BG3, maybe fleeing should make you lose charisma until long rest or something.
